docs: update readme (#270)

Author: kyletsang

README.md

@@ -1,13 +1,18 @@
-# react-router-bootstrap [![Travis][build-badge]][build] [![npm][npm-badge]][npm]
-Integration between [React Router] v4 and [React Bootstrap].
+# react-router-bootstrap [![npm][npm-badge]][npm]
+Integration between [React Router] v6 and [React Bootstrap].
 
 ## Installation
 
-For React Router v4:
+For React Router v6:
 ```sh
 npm install -S react-router-bootstrap
 ```
 
+For React Router v4 or v5 (see [rr-v4] branch):
+```sh
+npm install -S react-router-bootstrap@rr-v4
+```
+
 For React Router v3 or lower (see [rr-v3] branch):
 ```sh
 npm install -S react-router-bootstrap@rr-v3
@@ -19,10 +24,6 @@ Wrap your React Bootstrap element in a `<LinkContainer>` to make it behave like
 
 `<LinkContainer>` accepts same parameters as React Router's [`<NavLink>`]
 
-Please note that by default React Router will match any location that contains path specified in `to` prop.
-To make `<LinkContainer>` to match the location exactly, set `exact` prop to `true` or use `<IndexLinkContainer>` 
-instead.
-
 ## Example
 
 Following plain React Bootstrap component
@@ -41,14 +42,12 @@ import { LinkContainer } from 'react-router-bootstrap'
 
 See [CONTRIBUTING](CONTRIBUTING.md).
 
-[React Router]: https://github.com/reactjs/react-router
+[React Router]: https://github.com/remix-run/react-router
 [React Bootstrap]: https://github.com/react-bootstrap/react-bootstrap
 
-[build-badge]: https://travis-ci.org/react-bootstrap/react-router-bootstrap.svg?branch=master
-[build]: https://travis-ci.org/react-bootstrap/react-router-bootstrap
-
 [npm-badge]: https://badge.fury.io/js/react-router-bootstrap.svg
 [npm]: http://badge.fury.io/js/react-router-bootstrap
 
 [rr-v3]: https://github.com/react-bootstrap/react-router-bootstrap/tree/rr-v3
+[rr-v4]: https://github.com/react-bootstrap/react-router-bootstrap/tree/rr-v4
 [`<NavLink>`]: https://github.com/ReactTraining/react-router/blob/master/packages/react-router-dom/docs/api/NavLink.md